Multiple-skirt suspension insulator



LWSS

@cio M9 B9307 K. A. HAWLEY MULTIPLE SKIRT SUSPENSION INSULATOR Filed Aug. 9, 1924 @foto le,

i Aff@ i l) L EAWLE OZ 'VJTR, NEW YQRK, ASSG-NOR T0 LOGI'EE IBTS'LATOEJ CESL'BQ l?, TION, 0F BALTIMORE, MARYLAND, .A CORPORATON 0F MARYLAND MULTEPLE-SKERT SUSPENSION XNSULATGR .application filed August 9, 192e.

rl'lie invention relates to strain insulators adapted for use in connection with high tension lines.

The primary object of the invention, generall y stated, is the provision of a niultiple skirt suspension insulator having structural characteristics whereby the leakage path and puncture distance Will be as great as is practicable in order to obviate any probability or even possibility, oi shorty circuiting, with t current losses and other disadvantages attendn ant thereupon.

Another object of the invention, incre pan ticularly stated, is tlie `provision of a suitable multiple skirt insulator in which tile stein or body and the skirts are made separately, with the latter subsequently mounted upon tlie iiornier, the parts being so treated initially after assembling as to insure a perinanent union oi tlie skirts ivitli. the body and accomplish the effect oi integrality but in suoli a nianner as to preclude likelihood of producinn stresses or strains which iniglit cause fracture during tile process orn nianutacture, or ter Wlien the insulator is in actual 1 tne Vcts and advan l. d il in tne details oi con @C W, struction and arnient o parts to hereinafter more ,iesribed and claimed and illustrated to increase y lo iield of utility e levice, provided such variations conno departure troni the spirit oi 'lie invention or 'tl-ie scene of the claiins liereto appended. 4G in the drawing, tlie ligure is a view of an 'insulator coi'istructed in accordance with my nvention, one bali being in elevation and the other nali in longitudinal section.

Referring to the drawing detail, the nuineral l designates tlie stein or body which 1ded or otherwise rornied of porcelain i fcations niay be inade ,ntability and Widen 'tbe is i* or other suitable insulating material, and which preferably has a slightly constricted central portion 2 and substantially similar end portions 3 formed with alternate periph- Serial No. 731,159.

eral ribs and grooves e and 5, respectively. Between the central portion 2 and the peripherally corrugated or ribbed and grooved ends 3, the body has portions of its periphery tapered, as indicated at S and 27, for a purpose to be described, these tapered portions decreasing in dianieter toward the ends or" the body. ln connection with tlie above described main portion, stein or body, inake use oi5 skirts 8 and 9 ivliicli lieve convex upper surfaces l0 and ll, respectively, as is customary, in order to slied Water and to lessen any likeliliood of the accu tion of dust or other foreign matter oon. rlie skirt 8 is so ifornied as to prov e a peripheral nange l2 acting as a drip, and in tile present instance die under suriace is represent d as iorrned ar ribs and -vitlo alternate circular or annui grooves and iv iei are ni ovded for the 2' f.' s U M JJ w e, oui pose oi incieas A ene ai ea oi ene ca rent llie skirt 9 cessed or other@ flange l5, and au provided ivitli a dei]e7 lo which increases another function to nediat-e poin sub-skirt or i and which be The skirts l les i7 and i8, respect' 1ed in s' L.pe and su g @ed upon tlie 'tapered 1cody. n in tne Y l 1- I' oy is es inane aoove ano trie green porcelain tlie kirts and body is tlien coated Witn glaze, tno skirts pla ed in posi tion, and the entire insulator so formed is iired, causing tlie `portions to slirink and to tightly bilill body portion, the

interposed o il Q suiator is in fact unit.

The inal means might be van hough l have shown caps i9 enc are metallic yvliicli have t; ined uitli a tornate ribs anc 22, respectively, correspon( 4, t to olie ribs and eroozes and o at tbe ends oi the body butI preferably staggered in relation thereto. Fllie ends of the body may, if preierred, be

or other suitable elastic coated vvitl-x lan material, to provide a coating 23 covering the corrugated or ribbed and grooved ends andthe caps may also be similarly treated to provide a coating 24 therein. rlhe caps are applied to the ends of the body and held thereto by suitable cementitious material indicated at 25, which material is ordinarily placed within the caps, subsequently to which they are pressed onto the ends of the body, the cement filling the grooves and the surplus oozing out at the open ends of the caps and being removed. lf desired, the terminal elements might be embedded within or recessed into the ends of the body without departing from the scope ofthe invention.

ln the present instancethe cap 19 is shown as having a socket 26 while the cap 20 carries a stem 27 terminating in a. head 28. By

this arrangement it is evident that a plurality or series of the insulators may be strung together or connected, the stem 27 and head 28 of one being engaged within the socket 26 of another in an obvious manner. The sub-skirt or flange 16 surrounds the cap 20 so that only a portion of the stem 27 and the head 28 will project therebelow. One advantage of this feature is -that the connection between two of the insulators will be practicallyV housed and water, snow and dirt excluded.

A feature ofgreat importance is that the ange 16 serves as a tiring foot for the entire insulator, the lower edge being the point or area of rest. rlhe weight of the body l and skirt 8 will cause a firm and close contact at the tapered seat 7 and the weight of the skirt 8 alone causing it to engage properly at the tapered seat 6, thus insuring that the joints will be thoroughly fused. From the foregoing description and an inspect-ion of the drawing it is obvious that the plurality of skirts will greatly increase the leakage distance between the terminals or caps. It is also to be noted that the caps are separated by nearly the full length of the body, thus giving practically the maximum puncture distance. These features are of prime importance in a strain insulator used in connection with high tension lines.

While the insulator is shown and described as lhaving twoskirts, it is a contemplated possibility that it could be provided with .more or construlcted with only one, such variations or modifications bein@ covered by thel claims and being desiralble in some instances, depending upon the type of insulator and the specific manner of employment. L

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is:

.1. An insulator comprising a body ofy vltreous material formed with outwardlyi tapering seat portions spaced from its ends,

and a plurality of skirts adapted to be engaged upon and united with said seat portions.

2. ln an insulator,'a body of vitreous mallO 

